21919258336 has 48 divisors (see below), whose sum is σ = 45879480864. Its totient is φ = 10285310464.

The previous prime is 21919258307. The next prime is 21919258357. The reversal of 21919258336 is 63385291912.

It is a self number, because there is not a number n which added to its sum of digits gives 21919258336.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241951 + ... + 319966.

It is an arithmetic number, because the mean of its divisors is an integer number (955822518).

Almost surely, 2^21919258336 is an apocalyptic number.

It is an amenable number.

21919258336 is an abundant number, since it is smaller than the sum of its proper divisors (23960222528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21919258336 is a wasteful number, since it uses less digits than its factorization.

21919258336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562003 (or 561995 counting only the distinct ones).

The product of its digits is 699840, while the sum is 49.

The spelling of 21919258336 in words is "twenty-one billion, nine hundred nineteen million, two hundred fifty-eight thousand, three hundred thirty-six".